plural of 0-12-0

plural of 0-8-2

plural of 0-8-4

plural of 0-60-0

(chiefly US military slang) An otherwise unspecified time of night; some time when it is dark out.

(chiefly US military slang) Half an hour past 12(am) midnight, or more formal and exact would be 00:30; The practice of adding “dark” and “thirty” (30) can be used sometimes as a slang term in place of an otherwise specific time a time of night, meaning some time when it is dark out between 00:01 - 05:00 hours local time.

Under the Whyte notation system, a Mallet-type locomotive with no leading truck, two sets of four driving wheels, and two trailing wheels on a trailing truck.

Under the Whyte notation system, a Mallet-type locomotive with two leading wheels on a leading truck, two sets of eight driving wheels, and no trailing wheels.

Under the Whyte notation system, a Mallet-type locomotive with two leading wheels on a leading truck, a set of six driving wheels followed by another set of eight driving wheels, and no trailing wheels.

Under the Whyte notation system, a Mallet-type locomotive with two leading wheels on a leading truck, two sets of six driving wheels, and no trailing wheels.